<template>
	<view>
		<view class="search-box">
			<uni-search-bar @input="input" :radius="100" cancelButton="none"></uni-search-bar>
		</view>
		
		<!-- 搜索建议列表 -->
		<view class="sugg-list" v-if="searchResults.length !==0">
			<view class="sugg-item" v-for="(item,i) in searchResults" :key="i" @click="gotoDetail(item)">
				<view class="goods-name">{{item.goods_name}}</view>
				<uni-icons type="arrowright" size="16"></uni-icons>
			</view>
		</view>
		
		<!-- 搜索历史 -->
		<view class="history-box" v-else>
				<!-- 标题区域 -->
				<view class="history-title">
					<text>搜索历史</text>
					<uni-icons type="trash" size="17" @click="clean"></uni-icons>
				</view>
				
				<!-- 列表区域 -->
				<view class="history-list">
					<uni-tag :text="item" v-for="(item,i) in histories" :key="i" @click="gotoGoodsList(item)"></uni-tag>
				</view>
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				timer:null,
				kw:'',
				searchResults:[],
				historyList:['A','apply','C']
			};
		},
		onLoad(){
					this.historyList = JSON.parse(uni.getStorageSync('kw') || '[]')
		},
		methods:{
			input(e){
				
				clearTimeout(this.timer)
				this.timer = setTimeout(()=>{
					this.kw = e
					this.getSearchList()
				},500)
			},
		async	getSearchList(){
				//判断搜索关键词是否为扣
				if(this.kw.length ===0){
					this.searchResults = []
					return
				}
				
				const {data:res} = await uni.$http.get('/api/public/v1/goods/qsearch',{query:this.kw})
				if(res.meta.status !== 200) return uni.$ShowMsg()
				this.searchResults = res.message
				
				this.saveSearchHistory()
			},
			gotoDetail(item){
				uni.navigateTo({
					url:'/subpkg/goods_detail/goods_detail?goods_id=' +item.goods_id
				})
			},
			saveSearchHistory(){
				// this.historyList.push(this.kw)
				
				const set = new Set(this.historyList)
				set.delete(this.kw)
				set.add(this.kw)
				
				this.historyList = Array.from(set) 
				
				// 对搜索历史数据,进行持久化的储存
				uni.setStorageSync('kw',JSON.stringify(this.historyList))
			},
			clean(){
				this.historyList =[]
				uni.setStorageSync('kw','[]')
			},
			// 对搜索历史点击
			gotoGoodsList(kw){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?query=' +kw
				})
			}
		},
		computed:{
			histories(){
				return [...this.historyList].reverse()
			}
		}
	}
</script>

<style lang="scss">
	.search-box{
		position: sticky;
		top: 0;
		z-index: 999;
	}
	
	.sugg-list{
		padding: 0 5px;
		
		.sugg-item{
			display: flex;
			align-items: center;
			justify-content: space-between;
			font-size: 12px;
			padding: 13px 0;
			border-bottom: 1px solid #efefef;
			
			.goods-name{
				white-space: nowrap;
				overflow: hidden;
				text-overflow: ellipsis;
			}
		}
	}
	
	.history-box{
		padding: 0 5px;
		.history-title{
			display: flex;
			justify-content: space-between;
			height: 40px;
			align-items: center;
			font-size: 13px;
			border-bottom: 1px solid #efefef;
		}
		.history-list{
			display: flex;
			flex-wrap: wrap;
			
			.uni-tag{
				margin-top: 5px;
				margin-right: 5px;
			}
		}
	}
</style>
